I don’t know of many solid ones, though at that point you could maybe find a PCB to have fabricated. I think the GK96 may also come in an aluminum version and be north-facing? Not sure.
Better choices if you can go with just the top being aluminum. Looks like the Kono Kira is in stock with the silver-tone aluminum frame. It appears to be north-facing. The Melody 96can do the same thing, I think, as long as you’re careful with how you order.
Orrrr… You could just let it ALL hang out and learn enough KiCAD to revise this with north-facing LEDs and get a Heavy 9 from Norbauer. 